Sendmail Installation and Operation Guide
SMM:08-63
ConnectOnlyTo=address
[no short name] This can be used to override the connection address (for testing
purposes).
ConnectionRateThrottle=N
[no short name] If set to a positive value, allow no more than N incoming connec-
tions in a one second period per daemon. This is intended to flatten out peaks and
allow the load average checking to cut in. Defaults to zero (no limits).
ConnectionRateWindowSize=N
[no short name] Define the length of the interval for which the number of incom-
ing connections is maintained. The default is 60 seconds.
ControlSocketName=name
[no short name] Name of the control socket for daemon management. A running
sendmail daemon can be controlled through this named socket. Available com-
mands are: help, restart, shutdown, and status. The status command returns the
current number of daemon children, the maximum number of daemon children,
the free disk space (in blocks) of the queue directory, and the load average of the
machine expressed as an integer. If not set, no control socket will be available.
Solaris and pre-4.4BSD kernel users should see the note in sendmail/README .
CRLFile=name
[no short name] Name of file that contains certificate revocation status, useful for
X.509v3 authentication. CRL checking requires at least OpenSSL version 0.9.7.
Note: if a CRLFile is specified but the file is unusable, STARTTLS is disabled.
DHParameters
File with DH parameters for STARTTLS. This is only required if a ciphersuite
containing DSA/DH is used. This is only for people with a good knowledge of
TLS, all others can ignore this option.
DaemonPortOptions=options
[O] Set server SMTP options. Each instance of DaemonPortOptions leads to an
additional incoming socket. The options are key=value pairs. Known keys are:
Name
User-definable name for the daemon (defaults to "Daemon#")
Port
Name/number of listening port (defaults to "smtp")
Addr
Address mask (defaults INADDR_ANY)
Family
Address family (defaults to INET)
InputMailFilters List of input mail filters for the daemon
Listen
Size of listen queue (defaults to 10)
Modifier
Options (flags) for the daemon
SndBufSize
Size of TCP send buffer
RcvBufSize
Size of TCP receive buffer
The Name key is used for error messages and logging. The Address mask may be
a numeric address in dot notation or a network name. The Family key defaults to
INET (IPv4). IPv6 users who wish to also accept IPv6 connections should add
additional Family=inet6 DaemonPortOptions lines. The InputMailFilters key
overrides the default list of input mail filters listed in the InputMailFilters option.
If multiple input mail filters are required, they must be separated by semicolons
(not commas). Modifier can be a sequence (without any delimiters) of the follow-
ing characters: